DSA-1605-1

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Source
https://security-tracker.debian.org/tracker/DSA-1605-1
Import Source
https://storage.googleapis.com/debian-osv/dsa-osv/DSA-1605-1.json
JSON Data
https://api.osv.dev/v1/vulns/DSA-1605-1
Withdrawn
2024-05-15T05:36:14Z
Published
2008-07-08T00:00:00Z
Modified
2022-07-04T02:00:46Z
Summary
glibc - DNS cache poisoning
Details

Dan Kaminsky discovered that properties inherent to the DNS protocol lead to practical DNS spoofing and cache poisoning attacks. Among other things, successful attacks can lead to misdirected web traffic and email rerouting.

At this time, it is not possible to implement the recommended countermeasures in the GNU libc stub resolver. The following workarounds are available:

  1. Install a local BIND 9 resolver on the host, possibly in forward-only mode. BIND 9 will then use source port randomization when sending queries over the network. (Other caching resolvers can be used instead.)

  2. Rely on IP address spoofing protection if available. Successful attacks must spoof the address of one of the resolvers, which may not be possible if the network is guarded properly against IP spoofing attacks (both from internal and external sources).

This DSA will be updated when patches for hardening the stub resolver are available.

Affected packages